74LS170-4×4 Register File

The 74LS series of integrated circuits (ICs) was one of the most popular logic families of transistor-transistor logic (TTL) logic chips. 74LS series is a bipolar, low-power Schottky IC. The 74LS170 contains 16 high-speed, low-power, transparent D-type latches arranged as four words of four bits each, to function as a 4×4 register file.

74LS170 Features

• Simeltaneous Read/Write Operation
• Expandable TO 512 Words Of n-Bits
• Typical Acess Time Of 20 ns

74LS170 Specifications

Supply Voltage	4.75 – 5.25Vdc
Maximum Clock Frequency	40Mhz
Power Dissipation	2mW/gate @100kHz
Minimum Output Current	8mA
Propagation Delay	10nS
Fan Out (TTL Loads)	20

74LS170 Pinout Diagram

74LS170 Pin Description

Pin No	Pin Name	Description
1	D2	Data Input
2	D3	Data Input
3	D4	Data Input
4	RB	Read Address Input
5	RA	Read Address Input
6	Q4	Data Output
7	Q3	Data Output
8	GND	Ground
9	Q2	Data Output
10	Q1	Data Output
11	RE’	Read Enable Input (Active Low)
12	WE’	Write Enable Input (Active Low)
13	WB	Write Address Input
14	WA	Write Address Input
15	D1	Data Input
16	VCC	Positive Supply

Applications

• Storing data in digital form

Download 74LS170-4×4 Register File Datasheet from the link given below.